All Text and Formatting Facilities

All Text and Formatting Facilities

A compact scan page for strings, string views, char conversion, formatting, printing, regex, streams, and locale-adjacent text facilities.

How to use this reference page

Use reference pages to confirm names, categories, nearby facilities, and the constraints that matter before writing or reviewing code.

Scan the top of the page first to identify the primary types, functions, or algorithm families involved.
Use the nearby-page links when your question is really about a companion header, related algorithm family, or broader subsystem.
Validate tricky behavior with a small compileable example before relying on memory for details like invalidation, ordering, allocation, or lifetime rules.

All Text and Formatting Facilities

Owning and non-owning text types

std::string
std::wstring
std::u8string, std::u16string, std::u32string
std::string_view

Formatting and printing

std::format
std::vformat
formatter customizations
std::print
std::println

Low-level conversions

std::to_chars
std::from_chars
std::chars_format

Regex, streams, and locale support

std::regex, std::regex_match, std::regex_search, std::regex_replace
string streams and standard stream interfaces
locale facets and locale-aware formatting/parsing support

Practical rules

Use std::string_view for borrowed read-only text parameters.
Use <charconv> for fast low-level numeric parsing and formatting.
Use <format> or <print> when readability matters more than ad hoc stream chains.

Example in practice

#include <format>

int main() {
    auto line = std::format("answer = {}", 42);
    return static_cast<int>(line.size());
}